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Brief

Journal of China Coal Society, the 1st in the field of mining engineering, promotes the development of coal theory and practice, as well as academic exchanges at home and abroad to accelerate the transformation from scientific research to real productive forces. It is supervised by China Association for Science and Technology and sponsored by China Coal Society. Launched in 1964, it aims at providing key topics of coal scientific research and mining development. Its scope covers coal geology, geochemistry, geophysics, mineralogy and coal seam formation and evolution; petrophysics of coal; organic matter-rich shales, including mineralogy, formation, transport and storage of gases in coal and shales; unconventional energy systems (e.g. oil shales, shale gas, and other carbon-based fuels); ore deposits of materials and rare metals in coal and coal-bearing strata; and groundwater management. The journal is included in CA, JST, EI, CSCD.
Editorial Board

Editor-in-Chief
Liu Feng

Associate Editor
Fan Baoying, Xu Shengyang, Zhu Shuangcheng

Stability control method of surrounding rock in deep roadway with large deformation

WANG Wei-jun;YUAN Chao;YU Wei-jian;WU Hai;PENG Wen-qing;PENG Gang;LIU Xiao-sheng;DONG En-yuan

Journal of China Coal Society,2016,Vol 41,No. 12

To investigate the surrounding rock control of deep roadway with large deformations, the theories, such as Kanstner theory, were applied to study the influence of supporting resistances on the surrounding rock deformation in roadways subjected to high in-situ stress. The mechanical essences of the difficult control of these deformations were discovered, and the new supporting concepts of roadway stability were then proposed. The large roadway deformation mainly consists of discontinuous deformations that result from the shear dilation and dilation of shallow fractured surrounding rocks and the continuous deformations that mainly result from the stress-induced plastic deformations. Results indicate that the present supporting system exerts limited influences on the continuous deformation, and a part of the deformation cannot be successfully controlled, which means "given deformations" are encountered. To successfully control the roadway deformation and significantly reduce support cost, the support concept should be transferred from deformation control to stability control. This transfer will ensure the even distributions of in-situ stress, coordinated deformations and the eliminations of roof falling and wall caving. Thus, the integrity and stability of surrounding rocks will be further enhanced. In the excavation process of roadways, the enlarged roadway sections that can tolerate the "given deformations" and the support system that can continuously deform will provide higher supporting resistances. Therefore, the integrity and stability of roadway are ensured. Even and coordinated deformations of roadway will be successfully fulfilled. The practice results show that the support mainly by the integrated control technology of reserved deformation and "addable lengthening bolts + stiffness thread steel lengthening bolts + bolting net + W steel belt + sprayed concrete" and supplemented by the scheme of addable lengthening bolts strengthen roadway roof can control the stability of roadway surrounding rock effectively, and ensure the safety of roadway during its service.

Method of coal–rock image feature extraction and recognition based on dictionary learning

WU Yun-xia;TIAN Yi-min

Journal of China Coal Society,2016,Vol 41,No. 12

Experimental study on the relationship between the distribution of micro coal particles and the crushing energy

LUO Jia-yuan;HUANG Gun;XIONG Yang-tao;ZHANG Long

Journal of China Coal Society,2016,Vol 41,No. 12

Application of impedance test method in the simulation experiment of mine gas hydrate outburst prevention

ZHANG Qiang;WU Qiang;ZHANG Bao-yong;GAO Xia;LIU Chuan-hai

Journal of China Coal Society,2016,Vol 41,No. 12

Research on the shaping control of frozen wall and blasting vibration mitigation of shaft wall effect in mine vertical shaft

YANG Ren-shu;FU Xiao-qiang;YANG Li-yun;LI Xi-yong;CHEN Qi-fan;CHEN Cheng;CHEN Shuai-zhi

Journal of China Coal Society,2016,Vol 41,No. 12

Falling principle and support design of butterfly-failure roof in large deformation mining roadways

ZHAO Zhi-qiang ;MA Nian-jie ;GUO Xiao-fei ;ZHAO Xi-dong ;FAN Long

Journal of China Coal Society,2016,Vol 41,No. 12