Ventilation modeling goes hand in hand with gas drainage strategies.
通风系统建模与瓦斯抽放系统相互相成。
The above stated method was successfully applied to 23 large diameter gas drainage boreholes.
采用上述方法已经成功施工23口大口径瓦斯抽排钻孔。
By gas drainage, the negative pressure isn't stable in the goal, the coal oxidation accelerates.
由于瓦斯抽放，造成采空区负压不稳定，加速了煤体氧化过程。
Practice indicated that the surface boreholes have better effect on gas drainage from mining area.
实践表明，地面钻井对抽放采动区域瓦斯效果较好。
During the gas drainage test in No. 12 Mine of Pingdingshan Coal Mining Group, good gas prevention...
通过在平顶山十二矿的试验，取得了良好的瓦斯防治效果。
Having analysed the "test on the gas drainage under suction in goaf", the failure cause has been found.
通过对采空区抽放瓦斯试验进行分析，找出了试验失败的原因。
Essential way of solving the gas drainage problem of low permeability coal seam is to increase coal seam permeability.
解决低透气性煤层瓦斯抽放问题的根本途径是增加煤层的透气性。
Directional drilling technique has already become a key link in long broach construction for gas drainage of the mine.
定向钻进技术已经成为煤矿井下抽放瓦斯长钻孔施工成套技术的关键环节。
During overlying rock strata being fractured, the surface gas drainage boreholes may be damaged due to ground movement.
在长壁工作面通过的过程中，地面垂直钻孔可能随岩层移动而发生破坏。
Therefore, the development of coal-bed gas should be studied according to the principle of gas drainage and its practice.
因此，煤层气开发应充分研究和借鉴抽放瓦斯的原理和实践经验。
Because gas drainage is strong in 3308 workface of Chengzhuang coal mine, stop production often takes place for above-the-common.
成庄煤矿3308综放面由于瓦斯排放量大，多次造成因瓦斯超限停产。
Basing on finite element method and visual display technology, this paper analyses the gas drainage problem of goaf in Dalong mine.
用有限元数值模拟方法，结合图形显示技术，对大隆煤矿综采工作面采空区瓦斯抽放问题进行了计算分析。
Simulation results may bring forward reasonable Suggestions for the design of protective layer mining and relief-pressure gas drainage.
模拟结果可为保护层开采及被保护层卸压瓦斯抽采设计提供合理建议。
In order to improve gas drainage volume, gas drainage on fully mechanized caving face and gas drainage pipeline network system are analyzed.
为了提高矿井瓦斯抽放量，重点分析了综放工作面的瓦斯抽放和瓦斯抽放管网系统方面。
The results of experiment testify that the method not only realizes the normal ventilation and gas drainage in drivage roadway but also saves energy.
实验表明，该方法能较好地实现掘进巷道的正常通风和瓦斯排放，并达到节能效果。
Casings used in gas drainage Wells have large diameter and heavy weight, during the lowering process, compressive collapsing is an ordinary phenomenon.
瓦斯排放井的套管具有直径大、重量大，在下入井筒过程中，经常出现套管被挤毁的现象。
The paper analyzes the prospect of CMM based on investigations on coal output, gas emission and changes of gas drainage quantity in mine areas in China.
文章在分析我国煤矿区煤炭产量、瓦斯涌出量、瓦斯抽放量变化的基础上，提出对我国煤矿区煤层气开发前景的分析。
The successful development of this drilling machine provided reliable safety equipment for coal mines to practise gas drainage technology by long holes.
钻机的研制成功为煤矿实施长距离钻孔抽放瓦斯工艺提供了可靠的安全装备。
It proved that gas drainage with high position bores and elevation bores can both reduce laneway digging work and get fairly good gas extracting result.
实践表明高位抽放与仰角抽放方法相结合，既可减少钻场施工，又有较好的抽放效果。
Through the testing research about gas drainage on outsize coal sample, the relativity of coal mass deformation and drainage quantity & time is opened out.
通过大煤样的瓦斯排放试验研究，揭示了顺序加载与逆序加载下的煤体变形与瓦斯排放量以及排放时间的相关性。
Gas drainage in high gassy coal seam with low gas permeability is always an hard solved significant technology problem in the process of safety production.
高瓦斯低透性煤层的瓦斯抽放，一直是煤矿安全生产过程中的重大技术难题。
By using this method, the damage of surface gas drainage holes caused by induced excessive mining displacement can be effectively reduced if not being avoided.
采用提出的计算方法可避免由于受采动影响对地表瓦斯抽放钻孔引起的过大变形及其所造成的破坏。
The partial ventilator in the coal mine is an important equipment in mine digging, its dependability and efficiency affect directly the safety of gas drainage.
局部通风机是煤矿井下掘进过程的重要设备，其使用的可靠性和效能直接影响着瓦斯的安全排放。
There has already been a history of more than 50 years of gas drainage in our country, which has reached the advanced international standards from technology to the scale.
我国煤矿抽放瓦斯已有50多年历史，从技术到规模均达到世界先进水平。
The enlargement of hole diameter increased the exposed area and pressure releasing range of bored coal seam, and raised gas drainage amount and discharging effect from holes.
通过扩大钻孔的直径，从而达到增加钻孔的煤层暴露面积和卸压范围，增大钻孔抽排瓦斯量，提高钻孔的抽排效果。
Gas concentrations drop, and the effective gas drainage period of holes is shortened, because pores and cracks in the coal seam become completely developed after gas drainage.
针对煤层钻孔抽放瓦斯后煤层孔隙裂隙发育致使瓦斯浓度下降，钻孔有效抽放期缩短的技术难题，首次提出二次封孔方法。
Based on the analysis of the gas migration law, it has proposed an idea of "gas drainage under suction in goaf" so as to provide some new theoretical basis for the performance.
在对采空区瓦斯流动规律分析研究的基础上，提出了采空区瓦斯抽放的设想，为采空区瓦斯抽放提出了新的理论依据。
Based on the analysis of the gas migration law, it has proposed an idea of "gas drainage under suction in goaf" so as to provide some new theoretical basis for the performance.
在对采空区瓦斯流动规律分析研究的基础上，提出了采空区瓦斯抽放的设想，为采空区瓦斯抽放提出了新的理论依据。
应用推荐