The underground blaster should know that it should

First, safety procedures 1. Personnel in contact with explosive materials in the upper and lower parts must wear cotton or antistatic clothes. 2. The electric detonator must be transported by the blaster in person, and the explosive should be transported by the blaster or other personnel under the ---MORE---

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Coal mining technology - roadway excavation and excavat…

First, the roadway excavation method and the selection of mechanical equipment should meet the following requirements: 1 Full coal roadway and coal rock roadway excavation should be carried out by drilling and blasting method, equipped with electric drill, coal loader and other equipment. 2 Full-r ---MORE---

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Composite roof coal road anchor belt net and anchor cab…

Composite roof support is still one of the technical difficulties for Xinwen Mining (Group) Co., Ltd. to promote the application of coal road support. In the past, the town of Yuzhen Coal Mine used to have a roof during the tunneling process of composite roof coal roadway, which affected the promoti ---MORE---

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Coal and gas co-production technology

Underground coal gasification is carried out under conditions of underground gasifier. That is, the gasification hole coal at one end of the gas passage of the gasification passage in the coal seam is ignited, and a gasification agent such as air, oxygen and water vapor is blown from the air inlet h ---MORE---

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Market analysis, I didn’t expect you to be like Turke…

Turkey is known as an emerging economy. According to the Turkish National Bureau of Statistics, the gross domestic product (GDP) in 2017 was about 850.7 billion US dollars , an increase of 7.4% over the previous year. Its advantageous industries include agricultural products, textiles, automobiles, ---MORE---

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Problems with raw material crushing and grinding system…

Former small-scale beneficiation plant crushing mill ore particle size, about 25mm, which makes greatly reduced grinding efficiency of the mill. Since the mill is a fine grinding device, the grinding efficiency of the 25 mm (mm) ore is less than 80 micrometers (um) when the coarse crushing efficienc ---MORE---

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Shanhe Smart "town construction weapon" SWE80…

On May 5th, the mass production of Shanhe Smart SWE80E9 excavators and the launch ceremony was held in Changsha Shanhe Intelligent Industrial Park in Hunan. The ceremony was chaired by Chen Yougen, deputy director of the Shanhe Intelligence Technology Center. He Qinghua, Chairman, Zhang Daqing, Zhu ---MORE---

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