Results 51 to 60 of about 532 (178)

Experimental Study on Comprehensive Real-Time Methods to Determine Geological Condition of Rock Mass along the Boreholes while Drilling in Underground Coal Mines

Shock and Vibration, 2019
The geological condition is essential for mining design and disaster control in underground coal mines. The present research focuses on the real-time assessment method on rock mass condition during drilling boreholes.
Ganggang Niu, Kai Zhang, Bosong Yu, Yanlong Chen, Yu Wu, Jiangfeng Liu   +5 more
doaj   +1 more source

Short‐Term Response of Soil Health Indicators to Cover Crop Management in Small‐Scale Vegetable Cropping Systems

Journal of Sustainable Agriculture and Environment, Volume 5, Issue 2, June 2026.
ABSTRACT A 2‐year field experiment (2022–2023) was conducted on a clay loam soil in Quebec, Canada, to evaluate the short‐term effect of spring‐seeded cover crop termination methods on soil health indicators. A mixture of field peas (Pisum sativum L.) with oats (Avena sativa L.) in 2022 and with faba beans (Vicia faba L.) in 2023 was seeded in early ...
Michaël Brière, Valérie Gravel, Émilie Maillard, Denis A. Angers, Richard Hogue, Caroline Halde   +5 more
wiley   +1 more source

Design of signal generator for mine-used mud pulse wireless measurement while drilling

Gong-kuang zidonghua, 2019
For working conditions of small pump capacity and low pressure of directional drilling in coal mine underground, a mine-used mud pulse wireless measurement while drilling (MWD) device was developed, and technique requirements, structure composition and ...
LI Quanxin, CHU Zhiwei
doaj   +1 more source

Research on Precise Identification of Rock Strength Based on Bolt Drilling Parameters

Energy Science &Engineering, Volume 14, Issue 3, Page 1353-1371, March 2026.
Drilling detection test platform. ABSTRACT During roadway excavation, the presence of weak interlayers and fractured rock masses significantly affects roof stability. To achieve timely and effective roadway support, it is crucial to identify and predict different rock types based on drilling signals from roof bolters.
Qiang Zhu, Sheng Biao Wang, Da Jiang Wen, Chong‐Yu Song, Kang Zhou   +4 more
wiley   +1 more source

Current status and future trend of research on underground borehole measurement technology for coal mines

Meitian dizhi yu kantan
BackgroundUnderground borehole measurement emerges as a core technology for the safe production of coal mines. Its multi-parameter measurements, data accuracy, data transmission rate, and reliability directly influence the timeliness of early warning for
Long CHEN, Dongdong YANG, Quanxin LI, Zhiwei CHU, Jiguan ZHANG, Xiang CHEN   +5 more
doaj   +1 more source

Carbonate sedimentology: An evolved discipline

The Depositional Record, Volume 12, Issue 1, February 2026.
Abstract Although admired and examined since antiquity, carbonate sediment and rock research really began with Charles Darwin who, during a discovery phase, studied, documented and interpreted their nature in the mid‐19th century. The modern discipline, however, really began after World War II and evolved in two distinct phases.
Noel P. James, Peir K. Pufahl
wiley   +1 more source

Mine-used mud pulse wireless measurement while drilling device and its applicatio

Gong-kuang zidonghua, 2019
For problems of wired while drilling device (MWD) which used central cable drilling rig as signal transmission channel such as complex drilling rig structure, limited mechanical behavior, poor anti-interference performance and so on, a mine-used mud ...
FANG Jun, GU Shuancheng, SHI Zhijun, LI Quanxin   +3 more
doaj   +1 more source

Measurement-while-drilling (MWD) development for air drilling [PDF]

, 1992
The objective of this program is to tool-harden and make commercially available an existing wireless MWD tool to reliably operate in an air, air-mist, or air-foam environment during Appalachian Basin oil and gas directional drilling operations in ...
Harrison, W. H., Harrison, W. A., Rubin, L. A.   +2 more
core  

The morphosedimentary record of glacial to postglacial environmental changes in West Wiyâshâkimî impact crater lake and adjacent areas, northern Québec, Canada

Boreas, Volume 55, Issue 1, Page 110-133, January 2026.
Crater lakes in core regions of former ice sheets have the potential to preserve long‐term sedimentary archives that are otherwise rare in glaciated landscapes due to pervasive glacial erosion. Lake Wiyâshâkimî, an impact crater lake located in the inner core of the Québec‐Labrador Dome of the Laurentide Ice Sheet, provides a rare example of such a ...
Etienne Brouard, Patrick Lajeunesse
wiley   +1 more source

Long‐Term Organic Inputs Effects on Soil Carbon and Nitrogen Sequestration in a Temperate Agroecosystem

Soil Use and Management, Volume 42, Issue 1, January‐March 2026.
ABSTRACT Long‐term conservation agriculture with organic inputs is a promising strategy to enhance soil carbon (C) and nitrogen (N) sequestration, yet few multi‐decadal studies quantify these dynamics. Thus, the present study was aimed at evaluating the effects of compost, manure, cover crops, and fallow on soil organic carbon (SOC) and total nitrogen (
Md Nayem Hasan Munna, Rattan Lal
wiley   +1 more source