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Coal Seam Methane (CSM) Drainage Borehole Gas Flow Rate Calculator

Easily calculate and compute coal seam methane (csm) drainage borehole gas flow rate calculator with accurate equations, live formulas, and expert guidance.

Coal cleat permeability (typical 0.5 to 10 mD).

Drilled perforated drainage length.

In-situ desorption gas pressure.

Suction pressure applied by vacuum pump.

Calculated Result
19.17 m³/min

Gas Flow Rate

Gas Flow Rate

19.17 m³/min

Methane Drainage Flow Rate M3 Per Min

19.17

Daily Methane Drainage Volume M3 Per Day

27603

Pressure Squared Driving Potential Bar2

323.3

Safety And Cbm Capture Notice

Pre-drainage of coal seam methane prevents catastrophic outbursts during longwall shearing and captures clean fuel gas

19.17 — m³/min

Calculation Breakdown

  1. Applied FormulaModels compressible gas filtration drainage rates (m³/min) from in-seam horizontal methane drainage boreholes in underground coal seams to prevent gas outburst explosions.Q = \frac{\pi k L (P_{\text{res}}^2 - P_{\text{well}}^2)}{\mu Z R T \ln(r_e / r_w)}

Methane Drainage Gas Flow Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.04.89.61419Gas Flow Rate

What Is the Coal Seam Methane (CSM) Drainage Borehole Gas Flow Rate Calculator?

This tool computes coal seam methane (csm) drainage borehole gas flow rate calculator with high precision arithmetic.

How Does the Coal Seam Methane (CSM) Drainage Borehole Gas Flow Rate Calculator Work?

Models compressible gas filtration drainage rates (m³/min) from in-seam horizontal methane drainage boreholes in underground coal seams to prevent gas outburst explosions.

Coal Seam Methane (CSM) Drainage Borehole Gas Flow Rate Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

Q=πkL(Pres2−Pwell2)μZRTln⁡(re/rw)Q = \frac{\pi k L (P_{\text{res}}^2 - P_{\text{well}}^2)}{\mu Z R T \ln(r_e / r_w)}

Models compressible gas filtration drainage rates (m³/min) from in-seam horizontal methane drainage boreholes in underground coal seams to prevent gas outburst explosions.

How to Use the Coal Seam Methane (CSM) Drainage Borehole Gas Flow Rate Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Coal Seam Methane (CSM) Drainage Borehole Gas Flow Rate Calculator Example

Input Values:

coalPermeabilityMillidarcies:3.5
boreholeEffectiveLengthMeters:120
reservoirReservoirPressureBar:18
boreholeSuctionPressureBar:0.85
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required m³/min.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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