›› 2011, Vol. 32 ›› Issue (9): 2778-2784.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of supporting resistance of backfilling wall for gob-side entry retaining under typical roof conditions

KAN Jia-guang1, 2，ZHANG Nong1, 2，LI Bao-yu1, 2，SI Guang-yao1, 2   

  1. 1. School of Mining, State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; 2. State Key Laboratory of Deep Coal Mining & Environment Protection, Huainan Mining Industry(Group) Co., Ltd., Huainan, Anhui 232001, China
  • Received:2011-03-31 Online:2011-09-10 Published:2011-09-13

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Abstract: The common field gob-side entry retaining roofs are divided into three types, i.e. thick immediate roof, thin immediate roof and without immediate roof. Through utilizing the continuous laminate model and considering the factors of the support effect of the coal side in the roadway, the incentives of roof caving, etc., the calculation formulas of roadside support resistance under three kinds of roof conditions are obtained. According to the formulas, the increase bearing ability of coal side and the roof of filling areas benefit to decrease the support resistance of filling body beside roadways. With the decrease of the thickness of immediate roof, the support resistance of filling body increase.The roof collapse’s incentives would vary from different layers of immediate roof. Gravity causes the thick immediate roof’s collapses; and on the other hand, the movement of upper rock layers causes the thin immediate roof’s collapses.

Key words: gob-side entry retaining, roof structure, backfilling wall, support resistance

CLC Number: 

  • TD 322
[1] CHEN Shang-yuan, ZHAO Fei, WANG Hong-jian, YUAN Guang-xiang, GUO Zhi-biao, YANG Jun, . Determination of key parameters of gob-side entry retaining by cutting roof and its application to a deep mine [J]. Rock and Soil Mechanics, 2019, 40(1): 332-342.
[2] YANG Peng, HUA Xin-zhu, LI Ying-fu, LIU Qin-jie, YANG Sen. Backfill horizontal stability analysis of gob-side entry retaining with compound roof in deep mine [J]. , 2018, 39(S1): 405-411.
[3] HU Ming-ming, ZHOU Hui, ZHANG Yong-hui, ZHANG Chuan-qing, GAO Yang, HU Da-wei, LI Zhen，. Analysis of supporting resistance of reserved pier column for gob-side entry retaining in wide roadway [J]. , 2018, 39(11): 4218-4225.
[4] YANG Peng, HUA Xin-zhu, LIU Qin-jie, YANG Ming, CHENG Shi-xing, WU Biao，. Experimental study of dynamic evolution characteristic of floor fractal dimension of gob-side entry retaining with large section in deep mine [J]. , 2017, 38(S1): 351-358.
[5] WANG Bei-fang, LIANG Bing, SUN Ke-ming, WU Zhan-chao,SUN Wei-ji, JIANG Li-guo, WANG Jun-guang，. Research on overlying strata response and control during typical shallow coal seam longwall mining [J]. , 2017, 38(9): 2693-2700.
[6] WU Jing-ke, KAN Jia-guang, XIE Sheng-rong, XIE Fu-xing, CHEN Dong-dong，. Failure mechanisms and control of surrounding rock of deep gob-side entry retaining in soft rock strata under high stress [J]. , 2017, 38(3): 793-800.
[7] LI Ying-fu , HUA Xin-zhu, YANG Ke, LI Zhi-hua,. Sensitivity analysis of factors influencing support crushing in working face of improving upper limit under loose aquifer and countermeasures against support crushing [J]. , 2016, 37(5): 1425-1433.
[8] ZHANG Zi-zheng , BAI Jian-biao , CHEN Yong , LI Meng , . Investigation and application analysis of unbalanced bearing characteristics of gob-side entry retaining [J]. , 2015, 36(9): 2665-2673.
[9] HAN Chang-liang , ZHANG Nong , YAO Ya-hu , ZHANG Nian-chao , JI Ming. Transfer bearing mechanism of thick composite roof in gob-side entry retaining [J]. , 2013, 34(S1): 318-323.
[10] CHEN Yong , BAI Jian-biao , ZHU Tao-lei , YAN Shuai , ZHAO She-hui , LI Xue-chen . Mechanisms of roadside support in gob-side entry retaining and its application [J]. , 2012, 33(5): 1427-1432.
[11] LI Ying-fu，HUA Xin-zhu. Mechanical analysis of stability of key blocks of overlying strata for gob-side entry retaining and calculating width of roadside backfill [J]. , 2012, 33(4): 1134-1140.
[12] SHI Hong ，JIANG Fu-xing ，LI Lian-xiang,. Study on mechanism of abnormal pressure on support in fully mechanized sublevel caving face at geologic changing [J]. , 2006, 27(S1): 266-269.
[13] HUA Xin-zhu , ZHAO Shao-hua , ZHU Hao , HU Hua-jun，. Research on combined support technique of gob-side entry retaining [J]. , 2006, 27(12): 2225-2228.
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