Liaoning University

Beijing Chengtian Hengye Coal Mine Equipment Co. Ltd

Yonghui Xiao

Yishan Pan

Wei Wang

Hongying Wang

Lianpeng Dai

Aiwen Wang

Hao Luo

Hongrui Zhao

Kuiyong Liu

Zhicai Chen

An apparatus for improving the safety and efficiency of underground mining by issuing intelligent warnings of impending coal or rock dynamic disasters includes at least one coal or rock charge probe adaptable to a coal or rock face and configured to detect charge data generated by coal or rock cracking during a mining process, and a monitoring host electrically connected to the coal or rock charge probe and configured to receive the charge data and issue a warning of an impending coal or rock dynamic disaster when warranted by the charge data. In embodiments, the apparatus includes a plurality of channels, and is non-contacting and/or portable.

Coal or rock dynamic disaster warning apparatus and method

The present invention discloses a self-anchored opposite-pulling anti-impact anchor cable for sectional coal pillars and a using method thereof. The anchor cable includes a steel strand (), with an energy-absorbing and yielding terminal () and a stressed expansion-cracking terminal () respectively fixed to two ends of the steel strand, a bushing () sleeved outside the steel strand, a first lock () provided at one end of the steel strand and a second lock () provided at the other end of the steel strand; the stressed expansion-cracking terminal includes a self-anchored bushing () with a plurality of pre-splitting lines () arranged in the wall of the self-anchored bushing. Under stress, the wall of the self-anchored bushing cracks along the pre-splitting lines and bends and expands, so that it abuts against and is self-anchored to the edge of a sectional coal pillar at the outer side.

Self-anchored opposite-pulling anti-impact anchor cable for sectional coal pillars and using method thereof

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Beijing, China

Yonghui Xiao