Large dip angle soft thick coal seam top coal roadway surrounding rock control method

Abstract

The invention discloses a large dip angle soft thick coal seam top coal roadway surrounding rock control method. A roadway surrounding rock comprises I-beams and active-passive combined roadway protecting devices. Each active-passive combined roadway protecting device is composed of I-beam supports, protecting plates, I-beam buckles, anchor cables, locksets and screw connecting components, whereinthe I-beam supports, the protecting plates and the I-beams are matched in pairs, and the anchor cables, the protecting plates and the I-beams are matched in pairs; the three I-beam supports and the six anchor cables form the one active-passive combined roadway protecting device, the I-beam supports are arranged in parallel in a spaced mode, each protecting plate is arranged on the corresponding same side surfaces of the multiple I-beam supports in a penetrating mode, the protecting plates are connected with the I-beam supports through the I-beam buckles and the screw connecting components correspondingly, the anchor cables which are parallel to the I-beam supports penetrate through the protecting plates vertically, the I-beam supports and the anchor cables are staggered, and the anchor cables are connected with the protecting plates through the locksets correspondingly; and large dip angle soft surrounding rock roadway supporting is achieved, and the problem that pure anchor rod supporting or pure I-beam support supporting has inadequate control over a soft rock roadway is solved.

Description

technical field [0001] The invention relates to the field of roadway support in underground coal mines, in particular to a method for controlling the surrounding rock of a roadway supporting top coal in a soft and thick coal seam with a large dip angle. Background technique [0002] In recent years, bolt support theory and technology have been in-depth research and development, and bolt support has been widely used for its advantages in improving the stress condition of surrounding rock mass, improving the strength of surrounding rock mass and exerting the self-bearing capacity of surrounding rock , and achieved significant technical and economic benefits. [0003] However, the problem of soft rock support is more prominent. A large number of engineering practices in some mining areas have shown that the current bolt support technology is still highly dependent on the occurrence conditions of the roadway surrounding rock. It is difficult for the support to form a stable and...

AI Technical Summary

Problems solved by technology

However, in the actual bearing process of the support, the bearing capacity of the support is largely restricted by the structure of the support, the load distribution and the interaction between the support and the surrounding rock. However, because the stability of the support structure is still poor, and the simple passive support is difficult to exert the bearing capacity of the deep stable rock mass, a large number of supports still yield and fail under high stress.

[0005] In order to solve the problem of insufficient control of soft rock roadway by simple bolt support or simple I-steel support support, a safe, scientific and convenient support device and process are urgently needed to solve these problems

Images