12 .(b), the maximum anchoring force of the roadway anchor cable anchor cable is concentrated in the range of 30 m, and the anchoring force in the range of 0 ~ 15 m shows an increasing trend, and the peak point position is about 15 m, indicating that this range is the section with strong mining influence, and the maximum anchoring force of the solid coal spandrel anchor cable, the coal pillar spandrel and the arch anchor cable are 303kN, 278kN and 268kN respectively, and the anchoring force in the range of 15 ~ 30 m shows a decreasing trend.
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Research on the law of multiple mining in close coal seams and the roadway support of lower coal seam.
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