The cause of house crack determined by security coal pillar of village.
房屋裂缝是否由煤矿采煤引起，主要是看采空区是否进入村庄保安煤柱。
This paper offer the algebra ray method to preserve protective coal pillar.
本文采用代数射线法留设保护煤柱。
This paper analyzed and calculated width of coal pillar for driving roadway along gob.
对沿空掘巷时煤柱的留设问题进行了分析和计算。
The instability and failure of strip coal pillar along strike is a typical nonlinear process.
走向条带煤柱的破坏失稳是典型的偏离平衡态的非线性过程。
If the mined zone go into the security coal pillar, the house crack could be thought caused by mining.
房屋裂缝是否由煤矿采煤引起，主要是看采空区是否进入村庄保安煤柱。
Whether the section coal pillar is stable or not is the key to safety of irregular blocks coal mining.
区段保护煤柱的稳定与否是不规则块段安全开采的关键。
The study results provided theoretical basis for optimum design and excavation technology of coal pillar.
研究结果为优化煤柱设计和现场施工工艺提供了理论依据。
This paper has set up a geometric model for the purpose of studying of spontaneous combustion of coal pillar.
论文建立了用于煤巷自燃研究的几何场效模型；
With numerical simulation method, the distribution law of coal pillar support pressure in the floor was studied.
运用数值模拟分析方法，研究煤柱支承压力在底板的分布规律。
This paper introduced methods to select tunnel position and maintain measures for the tunnel in small coal pillar.
文章介绍了在煤柱中确定巷道位置的方法及巷道的维修措施。
By using the orthogonal design method, simulating with program FLAC, the optimized layout of coal pillar is given.
通过正交设计，利用FLAC软件模拟，给出煤柱稳定性最优的方案。
Because the coal pillar is reduced greatly, in result it causes a series of problems such as pressure, water and gas.
由于煤柱的大大缩小，势必带来压力、水、瓦斯等一系列问题。
The proposed instability criterion can be used to analyze the instability of coal pillar, i. e. coal pillar rock burst.
建议的失稳判据，可以用来分析煤柱的不稳定，即煤柱岩爆。
The paper introduces a method to use the observation technology to ascertain the width of stage coal pillar by an example.
通过一个实例介绍了用实测技术确定区段煤柱宽度的方法。
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。
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。
Small coal pillar in high stress area has pre-developed splits and large horizontal displacement, and its stress concentration degree is lower.
高应力区的小煤柱已充分预发育裂隙，且水平位移大，应力水平降低。
The mechanical model of key strata supported by coal pillar is set up according to the layout of coal pillars in the coalface of short wall mining.
根据短壁开采条件下保护煤柱的布设特点，建立由保护煤柱支承的关键层力学分析模型。
In the plastic limit analysis, the wrinkler's plate is smartly analyzed in yield-line theory to get the critical compression strength of the coal pillar.
在分析过程中，利用机动法对温克尔地基板（弹簧支撑板）进行了塑性极限分析，得出了煤柱抗压强度的临界值。
Accordingly, the distribution of abutment pressure on the block coal pillar is measured at working face with a steeply inclined seam of the12010 face, NO.
据此原理，实测得到了平煤集团十三矿12010大倾角综放开采工作面走向支承压力和区段煤柱侧向支承压力分布。
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 feasibility of the protective coal pillar mining in the artificial inclined steep drift in the thick (ultra thick) coal seam of a large slope is discussed.
论证了急倾斜厚(特厚)煤层伪斜上山保护煤柱回收的可行性。
The stability of coal pillar of the short-wall mining was analyzed systemically by numerical simulation with the rock failure process analysis software (RFPA2D).
采用岩石破裂过程分析软件RFPA2D系统，对短壁机械化开采的煤柱稳定性进行数值计算与分析。
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 dissertation draws the analytic map about the multifactor indices and the stability diagram about zoning indices rank of setting up the security coal pillar .
输出了多因素指数分析图和留设安全煤柱的区划指标等级稳定性图。
The opinion was put forward that the infection of roadway driving and coal mining need considered simultaneously when determination the reasonable width for coal pillar.
提出确定沿空掘巷合理煤柱宽度时，不仅需考虑掘巷扰动影响，还应将本工作面的超前采动影响作为一个重要影响因素。
By taking the on-site monitoring and research as a tool, the influence of coal mining, coal pillar size and underwater on the roof stability of coal roadways is analyzed.
阐述了哈拉沟煤矿主采煤层顶板的赋存特征，以现场监测、现场调研为手段，分析了煤层开采、护巷煤柱尺寸及地下水对煤巷顶板稳定性的影响，为今后煤巷顶板稳定性分类及合理支护提供依据。
The factors affecting coal pillar stability are discussed, and the technical way reducing coal pillar size and enhancing recovery ratio is put forward by means of rock bolting.
本文探讨了影响煤柱稳定性的因素，提出了采用锚杆支护加固煤柱减小煤柱尺寸提高房柱式采煤回采率的技术途径。
The roof of cavern is regarded as an elastic beam with support at the midpoint and the coal pillars are regarded as bearings so as to establishing a cavern roof-coal pillar system.
将顶板视为中点有支承的弹性固结梁，将煤柱视为支座，形成了顶板-煤柱系统。
The displacement Angle of strata has a great bearing on the size of coal pillar for protection of buildings on very thick unconsolidated layers, and has a great economic potentials.
地层移动角参数对巨厚松散层矿井的建筑物保护煤柱尺寸影响很大，经济潜力十分巨大。
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