Improvement of rock crushing quality based on load specifications set for electrically-driven hydraulic drilling rigs

D V Antonenkov,V Z Manusov,R Yu Tsarev

doi:10.1088/1757-899x/560/1/012006

Abstract

The analysis was completed on the main production factors which determine energy characteristics of an electrically-driven hydraulic roller-bit drilling rig during drilling operations under the condition of the Far North deposit. In addition, the correlation ratio between the parameters and electric energy consumption was analyzed for the DM-H drilling rig. The equations expressing the relation of the drilling rig load to the drilling speed have been identified. In order to improve the quality of rock crushing, we have modified the method of determining the properties and condition of the rock mass in order to correct the connection layout of the blasting circuit, the activation system, the change in the type of an explosive agent, as well as the composition and weight of the blasthole charge. The proposed approach allows reducing the cost of drilling and blasting operations by 6 % through the improvement in the accuracy of the designed physical and mechanical properties in terms of both the stratum depth and the strike of the mining block.

Highlights

Up to the present time, companies engaged into the open mining of mineral resources have operated under the insufficient data on the processing properties of rocks
The parameters of explosive loading can be adjusted by changing the type of explosive agent, composition of the blasthole charge, etc., while the physical and mechanical properties of rocks are a given value which does not depend on us: we can only determine them
The studies completed by the authors [7, 8] for various types of roller-bit drilling rigs found that the electric energy consumption during drilling operations is a random value that depends on the combination of drilling modes parameters

Summary

Introduction

Up to the present time, companies engaged into the open mining of mineral resources have operated under the insufficient data on the processing properties of rocks. The parameters of explosive loading can be adjusted by changing the type of explosive agent, composition of the blasthole charge, etc., while the physical and mechanical properties of rocks are a given value which does not depend on us: we can only determine them.

Results

Conclusion