The practice of bolt support in reserved coal drift in mining pressure area is introduced, helpful conclusion is obtained through observation and analyse.
介绍了煤巷锚杆支护在动压区留巷的实践，并通过观测及数据分析，得出了有借鉴意义的结论。
The excavation sequence is the key to the roadway stability in long-span full coal drift.
大跨度全煤巷道开挖顺序是关系到巷道稳定性的关键。
So we construct for the background by the Second Shizuishan Mining, tunneling of the coal road and rock drift, carried on research to single tunneling technique of the horizontal tunnel.
本文以石嘴山二矿煤、岩巷的掘进施工为背景，对水平巷道单巷掘进技术进行了研究。
Ma Nianjie, Gao Qian. Reliability design of bolt supporting in coal drift. Project Identification Material of coal Science Fnd, 1997.
马念杰，高谦。煤巷锚杆支护可靠性设计。煤炭科学基金项目鉴定材料，1997。
Coal mining in remote mountainous district mainly on drift of coalpit, and its influence on surface deformation has already been attention.
偏远山区矿山开采多以小窑掘进为主，其对地表变形的影响已引起人们的重视。
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。
When long wall mining to the dip in fully-mechanized coal winning working face is inclined area, we may can't use existing drift draw off water.
当倾斜长壁开采的综放工作面初采范围处于向斜构造区，造成初采放水无法利用已有巷道形成自流放水，必须考虑动力排水或其他的放水方式。
The shape and energy distribution of direct wave is mainly influenced by drift, while the energy distribution of reflected wave is influenced mainly by the interface between coal and rock.
巷道对各道直达波能量分布及波列形状有明显影响；煤岩分界面主要影响反射波能量分布。
The shape and energy distribution of direct wave is mainly influenced by drift, while the energy distribution of reflected wave is influenced mainly by the interface between coal and rock.
巷道对各道直达波能量分布及波列形状有明显影响；煤岩分界面主要影响反射波能量分布。
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