公开(公告)号：US20190071967A1

公开(公告)日：2019-03-07

申请号：US15767132

申请日：2016-11-18

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY

发明人： Jixiong ZHANG ,  Qiang ZHANG ,  Qiang SUN ,  Xiancheng MEI

IPC分类号： E21B49/02 ,  E21C41/18 ,  E21F7/00 ,  G06F17/50

摘要： A mining design method for an upper protective layer in coal seam mining, and provides a mining design method for a near-whole rock upper protective layer. Based on information about engineering geologic conditions of a protective layer mining well and physico-mechanical parameters of a coal-rock mass sample, a protective layer mining thickness M and an interval H between the protective layer and the protected layer are determined by means of numerical analysis such that an expansion deformation rate φ of a protected layer, a failure depth K of a floor plastic zone of a protective layer, and a coal seam gas pressure P meet the Provision in Prevention and Control of Coal and Gas Outburst. Then, according to a mining thickness percentage accounted by rock in the near-whole rock upper protective layer, a mining process of the near-whole rock protective layer is determined from among a traditional fully-mechanized coal mining process, a traditional fully-mechanized coal mining process assisted by single-row hole pre-splitting blasting, and a traditional fully-mechanized coal mining process assisted by double-row twisted hole blasting. This method provides a theoretical basis for safe mining of a low-permeability gas-rich coal seam without a regular protective layer, and further enriches mining design methods with a protective layer. This method is economically efficient, safe and efficient, and has a wide applicability.

公开(公告)号：US20180314770A1

公开(公告)日：2018-11-01

申请号：US15770500

申请日：2016-11-18

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY

发明人： Jixiong ZHANG ,  Qiang SUN ,  Qiang ZHANG ,  Wei YIN ,  Hao YAN

IPC分类号： G06F17/50 ,  G06Q50/02 ,  G06F11/263 ,  E21D23/04

CPC分类号： G06F17/5004 ,  E21C41/16 ,  E21D23/00 ,  E21D23/0481 ,  E21F15/00 ,  E21F15/005 ,  E21F15/04 ,  G06F11/263 ,  G06F17/5009 ,  G06Q50/02

摘要： Disclosed is a method for designing supporting parameters of a transition support for a mixed mining face of filling and fully-mechanized mining. The method includes: first, determining a total length of a mixed mining working face and a length of a filling section according to requirements of a coal mining production capacity of the mixed mining working face and a filling capacity of the filling section working face; then, establishing a mixed mining numerical model of filling and fully-mechanized mining by using three-dimensional distinct element software, and simulating and calculating a caving height of a roof of a transition section and a stress influence range of the transition section when a filling rate of a mined-out area of the filling section changes; based on a result of numerical simulation and calculation, performing curve fitting according to a correlation coefficient to obtain a functional relationship between the filling rate and the caving height and a functional relationship between the filling rate and the stress influence range of the transition section; and finally designing supporting parameters of a transition support in combination with actual engineering geological parameters. The method can provide a reference for supporting design of a support, and enables a smooth transition between a filling support and a fully-mechanized mining support for a mixed working face, thereby further enriching filling mining theories and expanding the application range of filling mining.