Determining the load on the support of horizontal workings during the development of coal deposits

Abstract

The problem of determining the strong dimensions of horizontal workings support elements constantly arises both during the operation of a deposit and during design. Its correct solution largely determines the safety, economy and uninterrupted operation. The variety of conditions in which a mine working passes does not allow determining the load on the support in the general case. Let us consider the issue of the roof pressure on the support of a horizontal working carried out in solid layered rocks, secured by a frame support with a straight top. A layered medium, each layer of which is a plate with sealed edges, is a repeatedly statically indeterminate system, and solving the problem of the pressure of this medium on the support by conventional methods was considered unrealizable for a long time. For the first time, a method for solving this problem was proposed by V.D. Slesarev in 1939 and called by him the sliding working method [9, 10]. Later, the sliding working method was applied by A.P. German [2], G.N. Kuznetsov [5] and others. The proposed work is devoted to the further development and specification of the processes under consideration. The description of the processes of deformation and destruction of roof rocks given below, of course, does not exhaust the issue and is to a certain extent schematic.