coal seam In A Sentence
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- The 10th coal seam floor's water invasion coefficient for region of interest is calculated by use of the modificatory water invasion coefficient computing formula.
- Sudong is the site of a major coal seam first discovered in 1918.
- Based on consideration of stress sensitivity of coal seam permeability, the single-phase flow rule of coal-bed gas in coal and cleats is studied by using non-equilibrium adsorption model.
- Underground peat and coal seam fires, the most difficult to extinguish, are still burning.
- The Silkstone coal seam is at its shallowest in the Silkstone area, and mining was an important local industry.
- The distribution patterns of underground coal seam is diversified. The plane distribution is only one of the simple curved surface distribution patterns.
- Underclay is a seatearth composed of soft, dispersible clay, or other fine-grained sediment, either immediately underlying or forming the floor of a coal seam.
- The paper held that the two leg shield caving powered support would not be suitable for the top coal caving mining in the hard coal seam and the joint crack undeveloped medium hard seam.
- It is a smouldering coal seam fire that ignited in 1688 and continues to burn today.
- Smoldering trash in a dump ignited a coal seam.
- 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.
- This is the only coal seam in the watershed.
- This paper is a guide to precise determination of the content of coal seam methane.
- The coal transmutative degree and variational rule of coal seam physical character are different in the prospection for CBM. The situation restricted CBM industrialization in China.
- The occurrence of rock burst not only need a great deal of elastic energy gathering in the coal seam and the around rock stratum, but also the external energy released by the main key stratum break.
- The Numa Block shaft was deep, giving access to a coal seam.
- Drilling borehole in hard coal seam is mostly used to discharge gas, and cross layer borehole, roof rock borehole and laneway are mainly used to discharge gas in soft coal seam.
- Underground coal seam fires are customarily quenched by inertization through mine rescue personnel.
- From Hales method, reversed refracted wave method shows accuracy and efficiency in detecting the thickness of remained coal seam.
- The reason taken for this new plan was to save the coal seam.
- On the road from Rostov-on-Don to Shakhty, beyond a landscape of barren wheat fields, slag piles rise like low mountains in a line that follows the coal seam deep underground.
- Geological condition in Zhaogezhuang coalmine, Kailuan is very complex. Numerous minor scaled structures and coal seam occurrence are main limitation factors to mine development all along.
- Factors affected coal seam permeability change and its law is analyzed.
- Using joint inversion of logging and seismic data, the transverse change of coal measure was studied and the lithologies of coal seam roof and bottom was predicted.
- In 1965 plans were drawn up to opencast mine the coal seam beneath Radcliffe and Newbrough.
- The 24-foot-wide ( 7-meter-wide ) air shaft was being dug toward a coal seam that is known to release methane, officials said.
- Gold, silver, limestone, coal seam gas, magnesite and gemstones are also mined.
- The surrounding rock of roadways in soft coal seam has low strength and bad stability.
- Coal seam Gas was a likewise major regional issue in northern New South Wales.
- By the 1870s, Nicholas Sheran ( an American entrepreneur ) mined a coal seam in the coulees on the west side of what is now the Oldman River.
- The Red Ash coal seam is found in the Mill Creek watershed.
- Eventually the coal seam dwindled, causing people to drift away.
- It employed 26 men underground and seven surface workers getting coal and fireclay from the Mountain coal seam.
- The contact is abrupt but conformable, and occurs at the base of the No . 1 or Ferris coal seam of the Ravenscrag Formation.
- The crack in the coal seam is divided into two kinds: endogenic crack and exogenous crack.
- In 1878, the main shaft was deepened to reach the Old coal seam at.
- Coal Mine and the coal seam 13 - 1 has especially complex hydrogeology condition.
- The strata approximately 2.5 times the thickness of the coal seam removed collapses and the beds above settle onto the collapsed goaf.
- No . 3 shaft was sunk to 707 yards to the Trencherbone mine through water bearing rock in 1899 . No . 4 shaft, sunk in 1913, intersected every workable coal seam.
- On a global scale, there are many coalfields suffered from spontaneous combustion of coal seam problems.
- The author considers that outburst of coal-seam gases is not only a dynamic phenomenon, but also a very complicated thermodynamical conversion process of energy.
- First, based on similar material model test, top coal cave-in characters in steep and thick seam were studied as well as failure law of main roof and features of surface subsiding.
- District 12, The seam, is the coal mining district.
- Coal reserves accessible in the Silkstone seam were anticipated to extend its life to 2019.
- The coal Measures have been reached under Sydney, by a deep bore at Balmain, which pierced a seam of coal io ft.
- 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.
- In 1910 exploration for coal discovered a thick seam of Rock salt beneath the mudstones.
- Like an overmined seam of coal, my sympathy for these miners has gone dry.
- The days of just sending men into a seam of coal with picks is over.
- Based on the conservation of mass, energy and chemical compositions, a model of seam-cavity growth is established to describe the process of underground coal gasification.
- To meet the needs of coal fall down mining technology, the technical reformation have been made on 6MG200W shearer and therefore it can use in the big seam angle, more ore and seam broken condition.
- This is sometimes obviated by holing in the beds below the coal, or in any portion of a seam of inferior quality that may not be worth working.
- In the closed seam, the pyrogenic rock compressed and compacted the structure coal. There is a stress concentrated at the tip of the structure, which could provide the inner energy for the gas.
- The only seam left was the Busty coal.
- Some kinds of genesis patterns of the seam thickness variation caused by bedding slip structure are analyzed and the forming reason of the coal parameter variation are expounded.
- The region around Waynesburg is underlaid with several layers of coking coal, including the Pittsburgh No . 8 seam, the Waynesburg seam, and the Sewickley ( Mapletown ) seam.
- The Peerless Mine was an underground room and pillar operation that mined coal near the outcrop of the Wyodak seam.
- Coal ( the Silkstone seam ) is close to the surface in this area and has been worked for centuries, though no longer.
- They're still mining a rich seam of high-grade coal.
- And how he could work up to his thighs in water in a two-foot seam of coal.
- Probing into outburst prevention techniques for coal roadway drivage in very thick seam with gas and co outburst.
- The dark bituminous layers of clay slate, which occur intercalated among the quartzites, have led, here as elsewhere, to the hope of coming upon a seam of coal, but it is contrary to experience that c
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