Method for determining anchoring depth of anchor cable along deep lane wall of empty crossheading entity coal side

Abstract

The invention discloses a method for determining anchoring depth of an anchor cable along a deep lane wall of an empty crossheading entity coal side. The method mainly comprises the steps of: collecting and recording the weight of drilled-out pulverized coal by one time in a coal drilling process to obtain a relationship curve between the pulverized coal and the depth, and drawing an equivalent stress distributional pattern graph; according to the equivalent stress distributional pattern graph, determining a position where minimum drilled pulverized coal exists as a basic roof advance faulted joint position, determining a position where maximum drilled pulverized coal exists as an advance stress peak position, determining a region between the advance stress peak position and the basic roof advance faulted joint position as a coal body elastic plastic extruding region; and determining the elastic plastic extruding region as a destination of reinforcing of the anchor cable, wherein the reinforced length of the anchor cable is required to be at least exceed the advance faulted joint position by 2.0 meters. According to the method, the roof advance faulted joint position is firstly determined and then the length of the anchor cable is determined, and thus the bottleneck of determining the length depending on experience in the conventional anchor cable reinforcing design is broken through, and the method for quantitatively determining the length of the anchor cable along the lane wall of the empty crossheading entity coal side is realized.

Description

technical field [0001] The invention relates to a coal roadway support technology, in particular to a support technology for a solid coal side roadway along a gob-side channel. Background technique [0002] With the transfer of coal mines to deep mining, the surrounding rock of the roadway has a large damage range, serious deformation, and difficult support, which seriously affects the safety of the roadway. This situation is particularly prominent in the support of the gob-side fully-mechanized caving along the trench at a depth of more than 800 meters, and the support of the two sides of the roadway has become a difficult point. The support of the two sides of the roadway involves the support of the goaf side roadway side, the solid coal side roadway side and the roof support. Wherein, support technologies such as filling materials (for example, Chinese patent CN200810159579.0 discloses the coal seam fully mechanized caving working face gobside retaining roadway gangway s...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the current problem of ambiguity in the anchorage depth, and propose a method for determining the anchorage depth of the solid coal side roadway, so as to determine the reinforcement range and calculate the effective length of the anchor cable

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