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The paper introduces roof control methods of goaf of large mining height fully-mechanized face by artificial forced caving with deep-hole blasting at seam 14 of Silaogou Mine and analyzes the effect.

介绍大同煤矿集团公司四老沟矿14#层404盘区8402大采高综采工作面人工强制深孔爆破处理采空区顶板的技术，并对其效果进行了分析。

It uses advanced completion pipe string and sand fracturing pipe string in completion process to attain the goal of layer fracturing and selective zone production of the parent well and its branch.

XQ90井是我国在川西地区所钻成的第一口气井分支井组，该井在完井工艺上采用了先进的完井管柱和加砂压裂管柱，达到了主、分支井分层压裂，分层开采的目的；其自行研制的双管采气井口可以分别控制主、分支井井口油压，为后期的采气作业提供了可靠的保障。

It is learned that the city will be blocked in accordance with the combination of thinning approach, strengthen Zhuozhou City, Hebei Province, Sanhe City, such as brothers and city and county links, from "order agriculture" and "Beijing vegetables green channel" model, dredge sand and gravel production from other provinces , transport channels, from the source to curb illegal sand mining activities in the city; At the same time, city, district levels should be taken by way of a joint law enforcement, focus on time to carry out special rectification, and resolutely clamp down on illegal sand mining, illegal mixing station, component plants, to ensure the city's major construction projects, the protection of the capital of the environment.

据了解，城市会被拦截按照间伐相结合的办法，加强涿州市，河北省三河市，如兄弟和市，县的联系，从&订单农业&和&北京蔬菜绿色通道&模式，疏浚沙石生产，其他省，运输渠道，从源头上遏制非法采砂活动的城市；同时，市，区两级应采取的方式，联合执法，重点对时间进行专项整治，坚决取缔非法采砂，非法搅拌站，构件厂，以确保城市的重大建设项目，保护首都的环境。

Most casing damages in Zhongyuan oilfield take place in the salt bed formations, and this has remained a problem that seriously threatens oil and gas production for long time. Causes of casing damages were investigated, and a series of measures in casing design have been adopted accordingly, but with unsatisfactory results.

中原油田由于地质结构复杂，断层纵横交错，油气埋藏深，又有多套盐膏层覆盖，再加上注采关系不够平衡，导致了一大批先期投产的油水井套损现象十分严重，这不仅造成了巨大的经济损失，而且破坏了注采关系，大幅度地降低了油气产量。

Meantime, based on the migratory characteristics of main roof fall, the main roof were divided into some plate group and plate group mechanical model was established for main roof with different crannies and fault ages.

同时针对深部采场顶板岩体垮落具有局部、分段、迁移的时空特征，将长壁工作面采场顶板划分成若干个相互铰接的薄板，建立了薄板组力学模型。

Under the stall-feeding condition, total DM intake increased while forage DM intake decreased when the proportion of concentrate in the diet was increased, regardless of the forage type.

在舍饲条件下，无论以哪种牧草为基础日粮，随着补饲精料比例的增加，总的干物质采食量相应增加，而牧草采食量有所下降。

"Big brother, why do you always pick one wild taro leaf and leave it there?" the younger one said.

弟弟说&哥哥，为什麼你每采一片姑婆芋叶就搁放在原采处？&

The extraction rate of coal in hydraulic coal mining is subject to the influence of a number of factors, and it varies widely, bepending on mining conditions.

水力采煤的原煤采出率有很多影响因素，由于开采条件不同，采出率差距很大。

The formula concerning how to control the oil contamination of coal mining machine hydraulic system was built based on the theory of the contamination control ,it is shown that the change of the oil contamination is in index regularity.

根据污染控制理论导出了采煤机液压系统油液污染控制方程，由方程知液压系统油液污染度的变化是按指数规律变化的，并分析了影响采煤机液压系统油液污染度的主要因素，提出在液压系统的设计阶段就要考虑液压系统的过滤净化性能，正确控制液压系统油液污染。

Rock burst was easily happened at chain pillars between hydraulic mining face and drying mining face.

在水采工作面和旱采工作面交接的护巷煤柱处，极易发生冲击矿压事故。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。