Abstract
The basic equations of the theory of linear hereditary creep are considered. An algorithm for determining the value of the anchor tension as a result of deformation of rocks in the bottom-hole zone of the barrel is presented. The area of the scope of roof bolting trunks in various breeds is defined.
Highlights
Consider the interaction between roof bolting in the bottom-hole zone of the barrel and a breed array that exhibits the properties of creep [1,2,3,4]
Radial displacement of the barrel surface will be caused by the movement of the bottom and creep of rocks
'ri – the proportion of relative displacements of the array points corresponding to the ends of the anchors caused by the removal of the bottom from the considered cross-section of the barrel for each approach
Summary
Consider the interaction between roof bolting in the bottom-hole zone of the barrel and a breed array that exhibits the properties of creep [1,2,3,4]. Z. proved that in the tasks of mechanics of underground structures in which boundary conditions and volume forces are time independent, the operator expressions for elastic constants can be replaced by algebraic expressions corresponding to the kernel of the integral equation (the method of variable modules). Radial displacement of the barrel surface will be caused by the movement of the bottom and creep of rocks. 'ri – the proportion of relative displacements of the array points corresponding to the ends of the anchors caused by the removal of the bottom from the considered cross-section of the barrel for each approach 'rn. 'ri – the proportion of relative displacements of the array points corresponding to the ends of the anchors caused by the creep of rocks for a period equal to the duration of the tunneling cycle '' rn. Where rs – the radius of the bearing washer; l*=l/lz; lz – the length of the fixed part of the anchor; l’=l/aij; аij – distance from the j-th anchor to the anchor
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