Through analyze the failure mechanism and structural feature of mine pillar and upside rock, the reasonable virgin coal width formula has been obtained.
通过对顺槽煤柱破坏失稳机理及煤柱上覆岩体的结构特征、垮落失稳机理的分析，提出了合理煤柱宽度的计算公式。
The cause of mine pillar destruction in in Dachang Tongkeng Tin Mine was analyzed from observation by photoelastic stressmeter embedded in mine stope 570.
通过对埋设于570中段光弹性应力计的观测，分析了该中段矿柱破坏的情况及原因。
Sublevel caving method without sill pillar is adopted in the south section of Fengshan Copper Mine.
丰山铜矿南缘采区应用无底柱分段崩落法采矿。
Sublevel caving without bottom pillar is the method of mining used at Huashugou Mine, Jiuchun Iron and Steel Co.
酒泉钢铁公司桦树沟铁矿所用采矿方法是无底柱分段崩落采矿方法。
Through the detail introduction on optimization of raining method in Shandong Wangcun Bauxite Mine, this paper puts forward a new mining method——longwall caving with artificial roof pillar.
通过对山东王村铝土矿采矿方法优化的介绍，提出了一种新的采矿方法——人工顶柱无底柱长壁式崩落法。
Based on the existing conditions, Pindu Municipal Gold Mine preferred short-hole shrinkage stoping without sill, intermediate and crown pillar to other mining methods and obtained excellent result.
平度市金矿利用现有的条件，因地制宜采用“三无”即无底、间、顶矿柱浅扎留矿法，收到了好效果。
The stability of boundary pillar, which can be found across in mine shifting from open-pit to underground mining, is very important for safe production of underground mine.
境界矿柱稳定性分析是露天转地下矿山经常遇到的问题，对于矿山进行地下开采安全生产极其重要。
By analysing the cause, course of formation exposed caved pillar in Malan mine, summarizes some law and applies it for production.
通过对马兰矿南四采区已揭露的陷落柱的成因、形成过程进行分析，总结出某些规律，并在生产中加以应用。
Practical experience of residual pillar resources recovery during old workings close period in Xiangxi Gold Mine was summed up in this paper.
本文总结了湘西金矿老矿山闭坑中充分回收残矿柱资源的实践经验。
Combined with mine production, a coal pillar recovery method is introduced, and how to determine recovery form and to rule safety measures are narrated in detail.
结合矿井生产实例，介绍了一种煤柱回采方法，并从合理布置回采方式和制定安全技术措施等方面进行了详细论述。
The research result will provide some scientific references for preserving reasonable coal pillar for the similar mine coals.
研究成果为类似条件综放开采留煤柱护巷煤柱合理宽度的确定提供了科学依据。
Based on the state of Qitaihe mine area, approaches the set rules and calculation methods of water_proof pillar at different conditions.
根据七台河矿区具体情况，对各种条件下的防水煤岩柱的留设原则及计算方法进行论述。
Controlling roof accidents and preventing the occurrence of bursting underground pressure are the priorities and difficulties to mine deeper isolated pillar face.
控制顶板事故，防范冲击矿压的发生是开采埋深较大的孤岛煤柱工作面的重点和难点。
The research achievements were applied to the dip coal pillar area of No. 21 mining district, Qianqiu coal mine successfully.
经千秋煤矿21采区下山煤柱区现场应用，效果良好。
For a mine to be changed from an open pit to underground stope, the stability of the boundary pillar has direct influences on the safety production of the mine.
此时为了处理好露天与地下同时开采相互影响的问题，一般采用空场法，它需要在露天坑底部、地下开采第一中段的矿房顶部保留一定厚度境界顶柱。
The accurate awareness of actual pillar boundary is the basis for the blast design for pillar extraction and is also one of the effective ways to improve the mine economic benefit.
准确掌握矿柱实际边界是矿柱回采爆破设计的基础，也是提高矿山经济效益的有效途径之一。
Thereby it can be seen that the load of Shi ge-jie mine coal pillar roof with sheet character and fluctuate character are the key factors of support selecting.
从而提出石圪节煤矿残留煤柱顶板岩层具有明显的薄板特征、波动特征的基本顶载荷是支架选型的关键因素及综采回收矿井残留煤柱支架选型的依据。
The stress relief method of hole diameter deformation was used to measure the stress distribution of the pillar structure in the mined area in a big phosphate mine.
采用孔径变形应力解除法，测量了某大型磷矿采空区中矿柱结构的应力分布规律；
Sublevel caving without sill pillar is used in Xishimen Iron Mine.
西石门铁矿采用无底柱分段崩落采矿法开采。
The main target coal seam of Xieqiao Mine is directly covered with the Quaternary bottom gravels, whose impermeability affects the reasonable retainment of waterproof pillar.
第四纪底砾层直接覆盖在谢桥煤矿煤系地层之上，其隔水性能影响到防水煤柱的合理留设。
The article analyzes how the hanging arch is caused during non-pillar sublevel caving in Jingtieshan mine, in order to provide a reference for rational mining organization and resources utilization.
本文着重分析了镜铁山矿无底柱崩落法悬顶问题，为合理安排矿山生产，合理利用矿产资源，提供了参考依据。
The article analyzes how the hanging arch is caused during non-pillar sublevel caving in Jingtieshan mine, in order to provide a reference for rational mining organization and resources utilization.
本文着重分析了镜铁山矿无底柱崩落法悬顶问题，为合理安排矿山生产，合理利用矿产资源，提供了参考依据。
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