Results 181 to 190 of about 63,148 (319)

Trends of the Coal Mining Industry in Japan

, 1951
Keiji Onuki
openalex   +2 more sources

A Novel Gas Extraction Technique in Coal Seams Utilizing Hydraulic Fracturing‐Dissolution and Analysis of Non‐Uniform Propagation of Fracture

Energy Science &Engineering, EarlyView.
ABSTRACT Extracting gas from low‐permeability coal seams is essential for mine safety and efficiency. To address this challenge, a novel technique combining hydraulic fracturing and dissolution was proposed. The feasibility of this method was verified through simulations based on the distinct element method.
Yun Lei, Yang Ju, Yongxiang Zheng, Xinze Peng   +3 more
wiley   +1 more source

Coal mining in Canada

, 1984
The current Canadian coal production is approximately 43 x 10? tonnes per annum. Two-thirds of this output is classified as thermal coal and one-third as coking or metallurgical coal. The three western provinces produce 92 percent of the total, the remainder is produced by the provinces of Nova Scotia and New Brunswick on the eastern coast of Canada ...
openaire   +1 more source

Improvements of Mining System and Installation at Meiji-Saga Coal Mine

, 1956
T Miyamoto
openalex   +2 more sources

Research on Optimal Charge Structure Selection and Active Control Methods for Subgrade Bench Blasting Based on Multi‐Objective Optimization

Energy Science &Engineering, EarlyView.
ABSTRACT To reduce the peak vibration velocity (PPV) of subgrade bench blasting vibration, the control variable method was used to analyze the blasting effect of different charging methods. Initially, the control variable method was used to evaluate the blasting performance of different charge structures.
Sun Yong, Zhang Zhongshuai, Tian Chenglin, Wang Qingbiao, Shi Zhenyue, Wang Keyong   +5 more
wiley   +1 more source

Rationalization of Coal Mining Industry

, 1961
Yoshiaki Taguchi
openalex   +2 more sources

Pyrolysis Characteristics of Fast‐Growing Grasses and the Evolution Behavior of Produced Gases

Energy Science &Engineering, EarlyView.
Pyrolysis and Analysis of Fast‐Growing Grasses. ABSTRACT Fast‐growing grass is a sustainable biomass resource because of its low cost and high production. Pyrolysis can convert biomass into sustainable chemicals and fuels. Therefore, the pyrolysis characteristics and the evolution of small molecular gases were studied using TG–FTIR–MS to investigate ...
Xi Zeng, Jie Wei, Haili Liu, Qingchao Hong, Heyun Liu, Xu Zhang, Wang Chen, Lei Hu, Haonan Liu   +8 more
wiley   +1 more source

Impact and elastic modulus of coal mining on terrestrial ecosystems. [PDF]

Sci Rep
Dong J, Dai W, Xu J, Zhang H, Li Y, Xie F.   +5 more
europepmc   +1 more source

Prospect of the Coal Mining Industry

, 1961
Hiroshi Saku
openalex   +2 more sources

Cost to mine coal in New Mexico, 1977; Mining cost estimates [PDF]

, 1976
David E. Tabet, Steve J. Frost, Frank Ε. Kottlowski, Paul Weir Company Paul Weir Company   +3 more
openalex   +1 more source