文章采用多目标决策法进行近水平煤层矿井设计的最优化。
This paper demonstrates the optimization of the nearly flat seam underground coal mine planning by the multi-objective decision-making method.
本文的决策模型对我国近水平煤层的合理开发有实用价值。
The decision model has practical value to the rational development of flat seams in China.
在水平煤层概率积分法的基础上，讨论了开采倾角为口的倾斜煤层的地表下沉随机介质模型。
On the basis of probability integration method for flat coal seam, the paper discusses surface subsidence random medium model for mining inclined seams with an Angle of a.
研究成果对我国厚煤层巷道布置以及高产高效矿井的高水平建设具有指导意义。
The study has the guidance meaning for entry arrangement in thick seams and high level building of high production and high efficiency.
提出水平构造应力是煤层底板变形破坏不可忽略的重要因素之一。
Point out that the horizontal structure stress is one of the important influence factors on the coal seam floor's failure.
巷道与上部煤柱边缘之间的水平距离X，是底板岩巷和邻近煤层巷道布置的重要参数。
The horizontal distance X between roadway and the edge of its upper pillar is an important parameter for roadway layout in floor strata and adjacent coal seams.
文章介绍了新疆乌鲁木齐矿业集团急倾斜近距离厚煤层水平分段轻型支架放顶煤联合开采技术及取得的技术经济效果。
This article presents the combined mining technology of horizonal sectional light prop used in steeply inclined short_interval thick coal seams and gains the technical and economic benefits.
介绍了国外厚煤层开采和安全技术的现状，及国内厚煤层开采技术在国际上的水平。
The paper states the present status of thick seam mining and safety technique in foreign country and technique level of that in China.
这些径向水平钻孔的形成可以沟通新的瓦斯流动通道，提高煤层气产量。
The radial horizontal bores can connect the new flowing channels of gas to increase the coal-bed methane production.
高压水射流径向水平孔钻进技术是水平孔施工技术之一，它是在垂直瓦斯抽放或煤层气勘探钻孔布置机械或水力扩孔装置，对准选定的煤层部位进行扩孔。
As one of radial horizontal drilling techniques, high pressure water jet drilling technology is capable of using mechanical or water jet apparatus to make a cavity at the selected coal seam.
建立了对非均质各向异性双重介质煤层气进行定向羽状水平井开采的数学模型。
A mathematical model for describing coalbed gas recovery in heterogeneous anisotropic dual medium of pinnate horizontal multilateral Wells was established.
得出了煤层倾角、水平分段高度对顶板变形的影响关系曲线，同时，给出了顶板破断的判据。
Relationship curves between seam dip Angle, horizontal section height and roof deformation are derived, at the seam time, the criterion of failure is given in this paper.
该技术可以在同一煤层气勘探井内，在不同煤层内完成多个径向水平钻孔。
The technology can make several radial horizontal bores at different coal formations in the same exploration well of coal-bed methane.
对于存在定压边界煤层气藏，压力双对数曲线的晚期是水平直线段，压力导数双对数曲线的晚期都是急剧下掉的曲线。
As for the coal-bed gas reservoirs with constant pressure boundary, the log-log pressure curves are horizontal lines and the log-log pressure derivative curves are falling rapidly in the late stage.
急斜煤层水平分段放顶煤开采与缓斜煤层不同，工作面沿煤层厚度的水平线布置，长度短。
The horizontal section top coal caving in steep seam is different from the gently inclined seam.
利用水平羽状分支井来开发利用煤层气，是一项新的钻探技术，它有别水平钻井，有其独特性。
Making use of horizontal pinnate branch well to develop and utilize coal seam gas, is a new drilling technique, which is different from horizontal drilling and has its own uniqueness.
湘东南地区资汝煤田上三叠统为一套灰黑色砂质泥岩、细砂岩、中粗粒砂岩以及煤层等沉积组合，具有砂泥薄互层层理、斜波状层理、水平层理及大型交错层理等沉积结构。
The Upper Triassic Series in the Zixing-Rucheng coalfield in southeastern Hunan is a set of grayish black sandy mudstone, fine sandstone, medium coarse sandstone and coal seams combination.
通过对沁水煤层气田的数值模拟与经济评价可知，用多分支水平井开发煤层气具有明显的经济效益优势。
By numerical simulation and economic evaluation for Qinshui CBM Field, it can be derived that MLHW obviously has a superiority of economic benefit in developing CBM.
定向羽状水平井技术是近几年兴起的一项煤层气地面抽采技术。
The directional pinnate horizontal multilateral well has been a rising technology in recent years for increasing coalbed methane recovery.
在煤层中使用该纠偏技术，在保证钻孔质量的同时，可极大地降低近水平孔钻进纠偏成本。
It will greatly reduce the cost on rectifying the deviation of the drilling and ensure the drilling quality.
为开采煤层气提高煤气产量，设计钻探了岚m 1 - 1煤层气多分支水平井，该井煤层气储量大，埋深在900 m处左右。
To increase output of coalbed gas well, we have designed and drilled Lan M1-1 coalbed gas multi-branch horizontal well. With a large coalbed gas reserves, the buried depth is about 900 m.
启动压力梯度的存在会使煤层中羽状水平井的降压效果变差，从而减少煤层气的产量。
The existence of start-up pressure gradient can make depressurization effect of pinnate horizontal multilateral well get worse, which promotes gas production reduced.
计算结果表明，利用定向羽状水平井能够大幅度提高低渗透煤层气的开采效率。
The result of simulation showed that the gas production in low-permeability coal bed could increase greatly by drilling pinnate horizontal multilateral Wells.
计算结果表明，利用定向羽状水平井能够大幅度提高低渗透煤层气的开采效率。
The result of simulation showed that the gas production in low-permeability coal bed could increase greatly by drilling pinnate horizontal multilateral Wells.
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