南梁煤矿综采工作面矿压规律研究
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摘要
南梁煤矿地处神府侏罗纪煤田地方开采区的边界地带,属于浅埋煤层。该矿过去长期采用房柱式采煤方法,劳动强度大,资源采出率低,安全难以保证,因此从2009年开始采用综合机械化采煤。浅埋煤层矿井综采面矿压显现在矿井开采初期尤其突出,严重影响工作面的安全生产,因此有必要对南梁矿20115综采面矿压规律进行研究。
本文在进行大量现场矿压观测的基础上,利用已有的相似材料模拟实验结果,运用理论分析等方法,对南梁矿20115综采面矿压规律进行了研究。
20115综采面现场观测、相似模拟和理论计算得出老顶初次来压步距分别为50m、40.2m和47.8m,综合分析为50m;周期来压步距分别平均为10.9m、11.3m和13.8m,综合分析平均为11m;现场观测和相似模拟的老顶来压平均增载系数分别为1.35和1.13,支架运行平稳;现场观测数据计算、相似模拟和理论计算的支架工作阻力分别为5373.5kN、5219kN和5918kN,结果基本一致,现场支架安全阀开启率只有5%左右,说明ZZ6800/14/27型四柱支撑掩护式液压支架能够有效控制顶板,矿压显现不强烈;相似材料模拟显示覆岩未出现下沉带,垮落带与裂隙带的界限不明显,即没有形成一般赋存条件的“三带”;下位岩层遵循自下而上的下沉规律,上位岩层下沉具有突发性。顺槽超前支护20m能够满足护巷要求,工作面之间20m护巷煤柱可以满足要求。
研究结果对南梁煤矿20115综采面的安全生产具有指导意义。
Nanliang coal mine is on the edge of the local mining district of the Jurassic oalfield ,it is a shallow seam.For a long time , this mine uses room and pillar mining method,this method is labor intensive and the extraction rate is low,also, the security is difficult to be gu- anteed.For this reason,fully mechanised mining method was used in 2009. shallow seam fully mechanised mining mine coal seams intermixed with crushed into the mining early, that will seriously affect the safety of the face, so it was necessary to the Nanliang 20115 fully mechanised mining face the pressure to study laws.
On the basis of a great deal of field pressure observation , with the results of the similar armaterial simulation experiment and theoretical analysis ,this article gives a research and analysis of mine ground pressure law of Nanliang coal mine's 20115 fully mechanized face.
The main roof's initial pressure pace of 20115 fully mechanized face is 50m and the periodic pressure pace is about 11m on the base of practical observations(50m、10.9m)、Resemble simulation(40.2m、11.3m) and theoretical analyse(47.8m、13.8m);the relationed data is 1.35(of practical observations) and 1.13(of resemble simulation); support resistance is 5373.5kN(of practical observations)、5219kN(of resemble simulation)and 5918kN(theoretical analyse),the result is identical fundamentally; The mine ground pressure behavior is not violent ,The proportion support resistance exceed the rated working resistance is only about 5%,the overburden rock didn't appear the integral breaking of the whole overlying strata,four-column hydraulic shield support of type ZZ6800/14/27 can effe ctively control the roof; The results of the similar material simulation experiment shows that:6000kN of support resistance is enough to balance the pressure of overlying rock and effectivly control the roof;Subsidence zone of overlying rock does not appear; The boundary between caving zone and fracture zone is not obvious, it didn't form the "three zones" in common condition; Su bsidence law of the lower strata follow the bottom-up rule while of the upper strata is unexpected . 20m' length of gateroad's leading support is enough to meet the requirements of roadway protecting ; 20m' width of chain pillar between two faces is enough.
The result of study have direction meaning for the minging of 20115 work face of Nanliang coal seam.
本文在进行大量现场矿压观测的基础上,利用已有的相似材料模拟实验结果,运用理论分析等方法,对南梁矿20115综采面矿压规律进行了研究。
20115综采面现场观测、相似模拟和理论计算得出老顶初次来压步距分别为50m、40.2m和47.8m,综合分析为50m;周期来压步距分别平均为10.9m、11.3m和13.8m,综合分析平均为11m;现场观测和相似模拟的老顶来压平均增载系数分别为1.35和1.13,支架运行平稳;现场观测数据计算、相似模拟和理论计算的支架工作阻力分别为5373.5kN、5219kN和5918kN,结果基本一致,现场支架安全阀开启率只有5%左右,说明ZZ6800/14/27型四柱支撑掩护式液压支架能够有效控制顶板,矿压显现不强烈;相似材料模拟显示覆岩未出现下沉带,垮落带与裂隙带的界限不明显,即没有形成一般赋存条件的“三带”;下位岩层遵循自下而上的下沉规律,上位岩层下沉具有突发性。顺槽超前支护20m能够满足护巷要求,工作面之间20m护巷煤柱可以满足要求。
研究结果对南梁煤矿20115综采面的安全生产具有指导意义。
Nanliang coal mine is on the edge of the local mining district of the Jurassic oalfield ,it is a shallow seam.For a long time , this mine uses room and pillar mining method,this method is labor intensive and the extraction rate is low,also, the security is difficult to be gu- anteed.For this reason,fully mechanised mining method was used in 2009. shallow seam fully mechanised mining mine coal seams intermixed with crushed into the mining early, that will seriously affect the safety of the face, so it was necessary to the Nanliang 20115 fully mechanised mining face the pressure to study laws.
On the basis of a great deal of field pressure observation , with the results of the similar armaterial simulation experiment and theoretical analysis ,this article gives a research and analysis of mine ground pressure law of Nanliang coal mine's 20115 fully mechanized face.
The main roof's initial pressure pace of 20115 fully mechanized face is 50m and the periodic pressure pace is about 11m on the base of practical observations(50m、10.9m)、Resemble simulation(40.2m、11.3m) and theoretical analyse(47.8m、13.8m);the relationed data is 1.35(of practical observations) and 1.13(of resemble simulation); support resistance is 5373.5kN(of practical observations)、5219kN(of resemble simulation)and 5918kN(theoretical analyse),the result is identical fundamentally; The mine ground pressure behavior is not violent ,The proportion support resistance exceed the rated working resistance is only about 5%,the overburden rock didn't appear the integral breaking of the whole overlying strata,four-column hydraulic shield support of type ZZ6800/14/27 can effe ctively control the roof; The results of the similar material simulation experiment shows that:6000kN of support resistance is enough to balance the pressure of overlying rock and effectivly control the roof;Subsidence zone of overlying rock does not appear; The boundary between caving zone and fracture zone is not obvious, it didn't form the "three zones" in common condition; Su bsidence law of the lower strata follow the bottom-up rule while of the upper strata is unexpected . 20m' length of gateroad's leading support is enough to meet the requirements of roadway protecting ; 20m' width of chain pillar between two faces is enough.
The result of study have direction meaning for the minging of 20115 work face of Nanliang coal seam.
引文
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[3] Holla L,Buizen M.Strata movement due to shallow longwall mining and the effect on ground per meability.Aus I M M Bullefin and Proceeding,Vol.295No.1 May 1990
[4] Bill Reid.Longwall mining in south Africa.Coal,Vol 99No.10 Oct.1994
[5] Singh R P,Yadav R N.Subsidence due to coal mining in India.In:Proceedings of the 1995 5th International Sy mposiumon land subsidence. IAHSP ublication, NO.234,1995. IAHS, Wallingford,England
[6] Rajendra Singh T N,Bharaf B.Dhar.Coal pillar loading in shallow conditions.International Journal of Rock Mechanics and Mining Science and Geo mechanics Abstracte, 1995, 53(8)
[7]宋振骐.实用矿山压力控制.徐州:中国矿业大学出版社,1989
[8]赵宏珠.中国综放长壁技术和装备出口印度应用效果分析.煤矿开采,2000(1): 5～8
[9]赵宏珠.浅埋采动煤层工作面矿压规律研究.矿山压力与顶板管理,1996(2): 27～32
[10]赵宏珠.印度综采长壁工作面浅部开采实践.中国煤炭,1998(12):49～51
[11]华能精煤神府公司大柳塔煤矿,西安矿业学院矿压研究室.大柳塔煤矿C202工作面矿压观测报告,陕西煤炭技术,1991(3):23～27
[12]张世凯等.厚松散层薄基岩煤层矿压显现规律.矿山压力与顶板管理,1998(1):5～8
[13]华能精煤神府公司大柳塔煤矿,西安矿业学院矿压研究室.大柳塔煤矿1203工作面矿压观测报告,陕西煤炭技术,1994(3,4):35～52
[14]Hou Zhongjie,Huang Qingxiang.Reserchon ground behavior in a shallow seam under thick loose strata.In :Nan Yue ed.Proceedings of Fuxing.China:Fuxing Mining Institute 1993.
[15]张李节,侯忠杰.浅埋工作面超前支承压力分布规律.矿山压力与顶板管理,1994
[16]侯忠杰.厚沙下煤层覆岩破坏机理探讨.矿山压力与顶板管理,1995
[17]张俊云等.浅埋采场矿压及覆岩破断规律.矿山压力与顶板管理,1998(3):35～37
[18]吕军.厚松散层浅埋煤层顶板结构及稳定性分析[硕士学位论文]:西安科技学院,2000
[19]石平五,侯忠杰.浅埋煤层矿压显现与岩层控制研究:(煤炭科学基金项目研究报告).西安:西安矿业学院,1996
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[21]黄庆享.浅埋煤层长壁开采顶板结构及岩层控制研究.徐州:中国矿业大学出版社,2000
[22]钱鸣高.岩层控制中的关键层理论.煤炭学报.1996(3):225～230
[23]侯忠杰.浅埋煤层关键层研究.煤炭学报.1999,24(4):359～363
[24]侯忠杰.地表厚松散层浅埋煤层组合关键层的稳定性分析.煤炭学报,2000, 25(2):127～131
[25]侯忠杰.组合关键层理论应用研究及参数确定.煤炭学报.2001,26(6):611～615
[26]黄庆享,田小明,杨俊哲.浅埋煤层高产高效工作面顶板来压特点与顶板支护分析.矿山压力与顶板管理,1999
[27]钱鸣高,李鸿昌.采场上覆岩层运动及支架阻力计算.综采顶板控制及矿压研究选编,1984
[28]史元伟.液压支架初撑力及工作阻力确定.煤炭学报,1985(9)
[29]史元伟.综采工作面液压自移支架和围岩动态相互作用支架支撑能力研究,第二届国际采矿科学技术讨论会论文,江苏,徐州,1991.10
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