Mine Injuries Research Articles

Interpreting MSHA Citations Through the Lens of Occupational Health and Safety Management Systems: Investigating Their Impact on Mine Injuries and Illnesses 2003–2010

Since the late 1980s, the U.S. Department of Labor has considered regulating a systems approach to occupational health and safety management. Recently, a health and safety management systems (HSMS) standard has returned to the regulatory agenda of both the Occupational Safety and Health Administration (OSHA) and the Mine Safety and Health Administration (MSHA). Because a mandated standard has implications for both industry and regulating bodies alike, it is imperative to gain a greater understanding of the potential effects that an HSMS regulatory approach can have on establishment-level injuries and illnesses. Through the lens of MSHA's regulatory framework, we first explore how current enforcement activities align with HSMS elements. Using MSHA data for the years 2003-2010, we then analyze the relationship between various types of enforcement activities (e.g., total number of citations, total penalty amount, and HSMS-aligned citations) and mine reportable injuries. Our findings show that the reduction in mine reportable injuries predicted by increases in MSHA enforcement ranges from negligible to 18%. The results suggest that the type and focus of the enforcement activity may be more important for accident reduction than the total number of citations issued and the associated penalty amount.

Investigation of the role of personal factors on work injury in underground mines using structural equation modeling

Work injuries in mines are complex and generally characterized by several factors starting from personal to technical and technical to social characteristics. In this paper, investigation was made through the application of structural equation modeling to study the nature of relationships between the influencing/associating personal factors and work injury and their sequential relationships leading towards work injury occurrences in underground coal mines. Six variables namely, rebelliousness, negative affectivity, job boredom, job dissatisfaction and work injury were considered in this study. Instruments were developed to quantify them through a questionnaire survey. Underground mine workers were randomly selected for the survey. Responses from 300 participants were used for the analysis. The structural model of LISREL was used to estimate the interrelationships amongst the variables. The case study results show that negative affectivity and job boredom induce more job dissatisfaction to the workers whereas risk taking attitude of the individual is positively influenced by job dissatisfaction as well as by rebelliousness characteristics of the individual. Finally, risk taking and job dissatisfaction are having positive significant direct relationship with work injury. The findings of this study clearly reveal that rebelliousness, negative affectivity and job boredom are the three key personal factors influencing work related injuries in mines that need to be addressed properly through effective safety programs.

Factors Associated With Fatal Mining Injuries Among Contractors and Operators

To explore factors associated with fatal accidents among contractors and operators by using the Mine Safety and Health Administration database. Cross-sectional data on 157,410 miners employed by operators or contractors during 1998-2007 were analyzed using logistic regression and multiple imputation. Univariate odds of fatal versus nonfatal accident were 2.8 (95% confidence interval, 2.3 to 3.4) times higher for contractors than operators. In a multivariable model, fatality was associated with contractor, less experience at the current mine, and occurrence at more than 8 hours into the workday (P < 0.05 for each). Differences in odds of fatality by employment type were more pronounced in surface mines. Contractors had a higher proportion of fatal injuries. Fatality also varied by mine experience, the number of hours worked before injury, work location, and mine type.

Coal Mine Safety: Do Unions Make a Difference?

Although the United Mine Workers of America (UMWA) has always advocated strongly for miners' safety, the empirical literature contains no evidence that unionization reduced mine injuries or fatalities during the 1970s and ′80s. The author uses an updated methodology and a more comprehensive data set than previous studies to examine the relationship between unionization and underground, bituminous coal mine safety from 1993 to 2010. She finds that unionization predicts a substantial and statistically significant decline in traumatic injuries and fatalities, the two safety measures that are the least prone to reporting bias. These results are especially pronounced among larger mines. Overall, unionization is associated with a 14 to 32% drop in traumatic injuries and a 29 to 83% drop in fatalities. Yet unionization also predicts higher total and nontraumatic injuries, suggesting that injury reporting practices differ between union and nonunion mines.

Occupational injuries and fatalities in a tanzanite mine: Need to improve workers safety in Tanzania.

IntroductionWork related injuries are common, and the mining industry accounts for a significant proportion of these injuries. Tanzania is among the countries with high rates of mining injuries, nevertheless pre-hospital care is almost non existant and health care service deliveries are poor. This study sought to identify factors associated with injuries and fatalities among miners in Mererani, Tanzania.MethodsA Cross - Sectional study of miners who sustained injuries and seen at Mererani health centre between January 2009 and May 2012.ResultsIn the selected period 248 injury patients were seen. All were males, and 54% were between 18 - 30 years age-group. Almost all (98.7%) didn’t use protective gears at work, and worked for more than 12 hours daily. Falling rocks were the leading cause of injury (18.2%), and majority sustained multiple injuries (33%). Of the patients seen, 41.3% died. The following were more likely to die than others; Primary education (p = 0.04), Less than 5 years work experience (p = 0.000), unintentional injuries (p = 0.000), fall injuries (p = 0.000) and sustaining multiple injuries (p = 0.000).ConclusionThe burden of injuries and fatalities demonstrated in this study, point to the need for implementation and monitoring of the use of safety equipment and operating procedures of the mines by government and other regulatory authorities. Initiation of pre hospital care at the mines and improved emergency medical service delivery at health centers in Tanzania.

Perspectives to pain associated to land mine injury

The current problem of land mines is worrying. Large mined territories endanger civilians and military personnel. About 100,000 land mines are scattered today in Colombia, and the mortal victims are growing each day. Land mine injuries result in significant musculoskeletal and abdominal injuries throughout the world. Accurate pain assessment is necessary to effective pain management. However, it is a challenge in polytrauma patients. Although it may be difficult, the initial multimodal analgesic management facilitates early rehabilitation and theoretically may prevent chronic pain progression after a land mine injury.

Analysis of 41 cases with vascular injury

Background: In this study we aimed to evaluate the shortterm clinical data of patients who were operated on for vascular injury. Methods: Forty-one patients who underwent surgery for vascular injury at the Cardiovascular Surgery Department of the Diyarbakır Military Hospital between January 2002 and May 2008 were included in this study. The patients were retrospectively evaluated in terms of causes of injury, characteristics, the procedures performed and the outcomes. Results: The causes of injuries were gunshot injuries in 22 patients (54%), stab wounds in 12 patients (29%), mine injuries in six patients (15%) and electric shock in one (2%) patient. The injuries were in the upper extremities in 19 patients (63.3%) and in the lower extremities in 11 patients (36.6%). The surgical methods performed were interposition in 11 arterial and six venous injuries, ligation in five arterial and nine venous injuries and repair in 10 arterial and five venous injuries. Postoperative amputation was required in none of the cases (0%) and one patient died (2.3%). Nineteen patients were transferred to next-level care center by airplane ambulance due to additional injuries and requirement for rehabilitation. No referral was required for vascular injuries or their complications. Conclusion: In peripheral vascular injuries, the mechanism and the site of injury, presence of additional lesions and early surgical intervention are the most important factors determining mortality and morbidity. According to our findings, no patients with isolated vascular injuries required to be transferred to the next-level care center. However, it should be kept in mind that the patients with additional problems or rehabilitation needs after the initial intervention may require transfer to the next-level care center.

Physical Surrogate Leg to Evaluate Blast Mine Injury

Antipersonnel blast landmines pose a significant threat in affected areas, with injuries to the lower extremity and amputation being common. Addressing a need for injury prediction and protection evaluation, a 50th percentile physical surrogate lower leg was developed incorporating the load transmission paths in the lower leg. Biofidelic and frangible materials were evaluated and selected based on high deformation rate properties compared to those for human tissues. The predicted leg injuries from experimental blast testing were in agreement with injury data for unprotected and protected legs. Post-test examination was found to be the only consistent and reliable evaluation method for predicting injury outcome, and an evaluation based on tissue damage was shown to be sensitive to changes in loading conditions, not possible with existing approaches. This study identified the severity of calcaneal fracture as the primary determinant of serious injury, which should be the focus of future protection development.

Understanding and Quantifying Arc Flash Hazards in the Mining Industry

Arc flash generally refers to the dangerous exposure to thermal energy released by an arcing fault on an electrical power system, and in recent years, arc flash hazards have become a prominent safety issue in many industries. This problem, however, has not been effectively addressed in the mining industry. Mine Safety and Health Administration (MSHA) data for the period 1990 through 2001 attribute 836 injuries to “noncontact electric arc burns,” making them the most common cause of electrical injury in mining. This paper presents results from several elements of a recent National Institute for Occupational Safety and Health study of arc flash hazards in mining and provides information and recommendations that can help reduce these injuries. The characteristics of past arc flash injuries in mining are first outlined, such as the electrical components and work activities involved (based on MSHA data). This is followed by a review of important concepts and terminology needed to understand this hazard. Next, methods for identifying, measuring, and managing arc flash hazards on a power system are covered, with emphasis on recommendations found in NFPA 70E, Standard for Electrical Safety in the Workplace. Finally, results are presented from a detailed arc flash hazard analysis performed on a sample mine electrical power system using IEEE 1584-2004a, focusing on components and locations presenting severe hazards, as well as engineering solutions for reducing the risk to personnel.

Mining injuries in Serbian underground coal mines – A 10-year study

Mining, especially underground coal mining, has always been a dangerous occupation. Injuries, unfortunately, even those resulting in death, are one of the major occupational risks that all miners live with. Despite the fact that all workers are aware of the risk, efforts must be and are being made to increase the safety of mines. Injury monitoring and data analysis can provide us with valuable data on the causes of accidents and enable us to establish a correlation between the conditions in the work environment and the number of injuries, which can further lead to proper preventive measures. This article presents the data on the injuries in Serbian coal mines during a 10-year period (2000–2009). The presented results are only part of an ongoing study whose aim is to assess the safety conditions in Serbian coal mines and classify them according to that assessment.

Coal Mine Safety: Do Unions Make a Difference?

Although the United Mine Workers of America (UMWA) has always advocated strongly for miners’ safety, prior empirical literature contains no evidence that unionization reduced mine injuries or fatalities during the 1970s and ‘80s. This study uses a more comprehensive dataset and updated methodology to examine the relationship between unionization and underground, bituminous coal mine safety from 1993 to 2010. I find that unionization predicts a substantial and significant decline in traumatic injuries and fatalities, the two measures that I argue are the least prone to reporting bias. These disparities are especially pronounced among larger mines. My best estimates imply that overall, unionization is associated with a 13-30% drop in traumatic injuries and a 28-83% drop in fatalities. Yet unionization also predicts higher total and non-traumatic injuries, suggesting that injury reporting practices differ between union and nonunion mines.

(P1-71) Can a Thick Snow Layer be Protective in Mine Injuries: Case Report

Despite their low mortality rate, mine injuries have high rate of morbidity. Depending on the severity, different levels of amputation may be required for the affected extremities. A mine injury composed of an atypical condition because of thick layer of snow is described in this presentation. A 21-year-old man was taken to the emergency department because of a mine injury. He had severe pain on his right heel. He was injured in an explosion in a rural state that had 50–60 cm of snow on the ground. Vascular access was provided and cast immobilization was applied to the right foot. The patient then was carried by ambulance helicopter. Vital signs were normal. Right ankle movements were limited and painful, and there were minimal edema and hematoma on both sides of the patient's heel in physical examination. Neither motor sensorial nor vascular deficit was determined. Comminuted calcaneus fractures were observed in x-ray and in the computerized tomography. A short leg circular cast was applied during follow-up. The cast was taken off at the end of the second month, and rehabilitation began. The follow-up was complete at the end of the sixth month with complete recovery. Mine injuries are special military injuries the sometimes affect civilians. In these injuries, lower extremities often are affected and amputation may be required. This case is similar to high-falling calcaneus fractures. This may have occurred as a result of an upwards blast impact that may have been weakened because of the thickness the layer of snow. Thick layers of snow may help protect civilians from mine injuries. This potential protective affect may be useful for researchers aiming to decrease mine injuries.

(A21) Injury Patterns of Blast Type Antipersonnel Land Mine Victims

Anti-personnel land mines are deployed in many regions of conflict around the world. A large number of civilians and militants are affected regularly due to the blasts of such mines. Once set, they remain as silent concealed killers for decades and challenge the safety of the civilians even during the times of peace. A descriptive study was carried out at the Anuradhapura Teaching Hospital during a six month period starting in July 2007. The total number of anti-personal land mine injuries admitted during this period was 89. In all cases, the body part primarily in contact with the mine had been a lower limb. Except for few occasions, extensive soft tissue damage associated with compound fractures necessitated some form of an amputation for those limbs in primary contact with the blast mines. Closed fractures of the calcareous, talus, and the tarsal bones were seen in two cases. Nearly two thirds of the patients sustained either soft tissue or bone injuries to the opposite lower limb. Twelve percent of the victims had compound fractures on the opposite tibia and fibula. Injuries to external genitalia were seen in 8% of the cases. Upper limb injuries were not rare and predominantly found on the contra lateral upper limb (17%). The majority of them were soft tissue injuries. Chest wall injuries were seen among 2% of the cases. Superficial facial injuries were seen among 7% of the cases. In one occasion a gingival injury was detected. Seven percent of the victims developed deterioration in level of consciousness. None of them clinically showed any external physical trauma to the head. In some instances, the Glasgow Coma Scale (GCS) was ranked as 7 in which tracheal intubation and ventilation were needed. It was evident in this study that the majority of the affected patients sustained severe injuries in both lower limbs in contrast to some of the previous available studies.

The business cycle and the incidence of workplace injuries: Evidence from the U.S.A.

Introduction The current study explored the association between the business cycle and the incidence of workplace injuries to identify cyclically sensitive industries and the relative contribution of physical capital and labor utilization within industries. Method Bureau of Labor Statistics nonfatal injury rates from 1976 through 2007 were examined across five industry sectors with respect to several macroeconomic indicators. Within industries, injury associations with utilization of labor and physical capital over time were tested using time series regression methods. Results Pro-cyclical associations between business cycle indicators and injury incidence were observed in mining, construction, and manufacturing but not in agriculture or trade. Physical capital utilization was the highest potential contributor to injuries in mining while labor utilization was the highest potential contributor in construction. In manufacturing each effect had a similar association with injuries. Conclusion The incidence of workplace injury is associated with the business cycle. However, the degree of association and the mechanisms through with the business cycle affects the incidence of workplace injuries was not the same across industries. Impact on Industry The results suggest that firms in the construction, manufacturing, and mining industries should take additional precautionary safety measures during cyclical upturns. Potential differences among industries in the mechanisms through which the business cycle affects injury incidence suggest different protective strategies for those industries. For example, in construction, additional efforts might be undertaken to ensure workers are adequately trained and not excessively fatigued, while safety procedures continue to be followed even during boom times.

Perfil clínico y microbiológico de las lesiones por minas antipersonal en el Hospital Pablo Tobón Uribe, Medellín, 2003-2005

The counts of antipersonnel mine injuries are increasing worldwide, but in Colombia, documentation of the clinical and microbiological characteristics of these lesions is lacking. To determine the clinical and microbiological characteristics of antipersonnel mine injuries for patients admitted for treatment during a 2 and a half year period. The medical records were reviewed for 151 patients hospitalized with injuries caused by antipersonnel mines. The admissions occurred between January 1st 2003 and July 31st 2005 at a highly specialized university hospital, the Pablo Tobón Uribe Hospital in Medellín, Colombia. All patients were male, mean age 24 years old, and all but 8 of them military. The length of stay averaged 20 days and hospital mortality 4%. Multiple lesions occurred in 66.8% of the cases, 88.0% of the injuries affected the limbs, and amputations were mandated in 52.3% of patients. A total of 313 specimens were cultured--68.7% of cultures were positive, and 386 microorganisms were identified. The most prevalent bacteria in the first culture were Pseudomonas aeruginosa and Escherichia coli. In subsequent cultures, P. aeruginosa and Enterococcus faecalis appeared. Most of the patients (93.4%) received standard antibiotic therapy, ampicillin/sulbactam. The clinical and microbiological characteristics of patients were related to their military occupation and the complex injuries produced by the mines. Knowledge of these characteristics will permit the design of better management strategies and empirical treatments.

The potential impact of light emitting diode lighting on reducing mining injuries during operation and maintenance of lighting systems

Research by the US National Institute for Occupational Safety and Health (NIOSH) indicates that light emitting diodes (LEDs) can be used to enhance safety by improving a miner’s ability to see mining hazards and reducing glare. This paper investigates if LEDs provide another benefit by reducing miner exposure to hazards during maintenance and operation of LED lighting. LEDs could provide useful lives up to 50 times longer than incandescent lighting commonly used in mining and could enable design changes to reduce certain hazards. The mining accident records compiled by the Mine Safety and Health Administration (MSHA) were examined to determine the extent and nature of accidents involving the maintenance and operation of mine luminaries. A total of 140 relevant accident records were found for the years 2002–2006. These incidents resulted in 3668 days lost from work with an additional 925 days of restricted activity. The injury narratives were studied to determine if the implementation of LED-based luminaries could reduce injury severity and frequency. The greatest near-term potential impacts appear to be related to reducing maintenance and cap lamp redesign. Longer term (5 years), low-power and lightweight auxiliary LED lighting for surface mines could also have potential impact for improving safety.

Visual performance for trip hazard detection when using incandescent and led miner cap lamps

Introduction Accident data for 2003-2007 indicate that slip, trip, and falls (STFs) are the second leading accident class (17.8%, n = 2,441) of lost-time injuries in underground mining. Proper lighting plays a critical role in enabling miners to detect STF hazards in this environment. Often, the only lighting available to the miner is from a cap lamp worn on the miner's helmet. The focus of this research was to determine if the spectral content of light from light-emitting diode (LED) cap lamps enabled visual performance improvements for the detection of tripping hazards as compared to incandescent cap lamps that are traditionally used in underground mining. A secondary objective was to determine the effects of aging on visual performance. Method The visual performance of 30 subjects was quantified by measuring each subject's speed and accuracy in detecting objects positioned on the floor both in the near field, at 1.83 meters, and far field, at 3.66 meters. Near field objects were positioned at 0 degrees and ± 20 degrees off axis, while far field objects were positioned at 0 degrees and ± 10 degrees off axis. Three age groups were designated: group A consisted of subjects 18 to 25 years old, group B consisted of subjects 40 to 50 years old, and group C consisted of subjects 51 years and older. Results Results of the visual performance comparison for a commercially available LED, a prototype LED, and an incandescent cap lamp indicate that the location of objects on the floor, the type of cap lamp used, and subject age all had significant influences on the time required to identify potential trip hazards. The LED-based cap lamps enabled detection times that were an average of 0.96 seconds faster compared to the incandescent cap lamp. Use of the LED cap lamps resulted in average detection times that were about 13.6% faster than those recorded for the incandescent cap lamp. The visual performance differences between the commercially available LED and prototype LED cap lamp were not statistically significant. Impact on Industry It can be inferred from this data that the spectral content from LED-based cap lamps could enable significant visual performance improvements for miners in the detection of trip hazards.

Underground coal mining injury: A look at how age and experience relate to days lost from work following an injury

Coal has been mined in the United States since colonial times and coal mining has always been a dangerous occupation. Despite the dangers involved in coal mining, coal is essential to the functioning of our society. Coal provides energy for products, businesses, and homes. Not only is coal mining a dangerous occupation, but, like many other industries, coal mining has also been referred to as a “graying occupation” as many coal miners are reaching retirement age. Younger workers possess certain advantages as older workers may have age-associated decrements in cognitive function, health, and recuperative ability. Although there are documented decreases in health and safety associated with age, there are also benefits at the workplace associated with increasing age. Increasing age brings about more experience and familiarity with the work environment. This study used the Mine Safety and Health Administration’s (MSHA) database on accidents, injury, and illness from the years 2003 through 2007 to examine how age, experience at the current mine, total years experience as a coal miner, and experience in the current job affects injury severity. The results of the data indicated that there was a relationship between age and days lost as well as total mining experience and days lost following an injury. Furthermore, the data indicated an increased risk of overexertion injuries as age increases. These are important findings for the coal mining industry as many miners are more experienced and older.

Analysis of applied forces and electromyography of back and shoulders muscles when performing a simulated hand scaling task

Hand scaling is a physically demanding task responsible for numerous overexertion injuries in underground mining. Scaling requires the miner to use a long pry bar to remove loose rock, reducing the likelihood of rock fall injuries. The experiments described in this article simulated “rib” scaling (scaling a mine wall) from an elevated bucket to examine force generation and electromyographic responses using two types of scaling bars (steel and fiberglass-reinforced aluminum) at five target heights ranging from floor level to 176 cm. Ten male and six female subjects were tested in separate experiments. Peak and average force applied at the scaling bar tip and normalized electromyography (EMG) of the left and right pairs of the deltoid and erectores spinae muscles were obtained. Work height significantly affected peak prying force during scaling activities with highest force capacity at the lower levels. Bar type did not affect force generation. However, use of the lighter fiberglass bar required significantly more muscle activity to achieve the same force. Results of these studies suggest that miners scale points on the rock face that are below their knees, and reposition the bucket as often as necessary to do so.

Mining equipment safety: a review, analysis methods and improvement strategies

This article presents facts and figures on mining equipment safety and reviews various important aspects of mining equipment safety including quarry accidents, electrical accidents, equipment fires, maintenance-related mining accidents, causes of mining equipment accidents and major ignition sources for mining equipment fires. A number of methods considered useful for performing mining equipment safety analysis are also presented. Useful strategies to reduce mining equipment fires and injuries, guidelines to improve electrical safety in the mining industry, and human-factor-related tips for safer mining equipment are discussed.